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Cripple Creek & Victor Gold Mining Company <br />Squaw Gulch VLF Phase 1 <br />(9,550-foot Elevation Bench to Geomembrane Panel P1635) <br />Final Report <br />Quality Assurance Monitoring & Test Results <br />January 2016 <br />Project No.: 74201125N0 Page 19 <br />compacted thickness, and suitability for geomembrane deployment. Amec Foster <br />Wheeler CQA personnel identified angular particles, ruts, desiccation cracks on the SLF <br />surface and brought these flaws to the attention of Ames for repair prior to <br />geomembrane deployment. Ames completed repairs by placing fines from the SLF <br />processing plant or from temporary stockpiles of fine SLF to smooth and re-compact the <br />fill surface in areas that were observed to be rough or inadequate for geomembrane <br />deployment, as discussed in Section 2.6. Amec Foster Wheeler and ECApplications <br />approved the final surface of SLF prior to geomembrane deployment. <br />Moisture Density Test Results <br />Amec Foster Wheeler performed a total of 296 in-place moisture-density tests of SLF. <br />The field moisture content and density test results were compared to the standard <br />Proctor dry density and optimum moisture content values of material with similar <br />gradation and plasticity characteristics. Proctor dry density and optimum moisture <br />content values for samples with greater than 10 percent plus ¾-inch were tested to <br />ASTM D4718 to facilitate direct comparison to nuclear density values. The actual <br />moisture-density testing frequency of approximately one test per 400 cubic yards <br />exceeded the minimum specified testing frequency of one test per 500 cubic yards per <br />project technical specifications. Nuclear density tests performed are summarized in <br />Table 11. Any failing areas were reworked, re-compacted, and re-tested to meet project <br />technical specifications. The number of retests was not used to determine the testing <br />frequency. Holes made in the SLF during testing were filled by tamping fine SLF or <br />bentonite material into the holes, as specified. <br />Depth Verification <br />Ames performed SLF depth verification using a drill. A total of 202 depth checks were <br />performed to verify that the minimum 12-inch-compacted depth had been achieved. <br />Amec Foster Wheeler monitored the SLF depth verification tests and documented the <br />results. Depth verification holes were filled using bentonite. All compacted SLF <br />thicknesses as measured by the verification holes met or exceeded project <br />requirements. The testing frequency of 2.8 holes per acre exceeded the minimum <br />specified testing frequency of two holes per acre. The SLF depth verification results are <br />presented in Table 12. <br /> Drain Cover Fill <br />Amec Foster Wheeler provided visual monitoring of DCF placement. One Amec Foster <br />Wheeler monitor and at least two Ames laborers were present monitoring each dozer, <br />unless two dozers were within approximately 50 feet of each other during placement. <br />Amec Foster Wheeler verified that wrinkles in the geomembrane did not fold over, that <br />PVC grade markers were placed on a maximum 50-foot by 50-foot grid and at grade <br />breaks, and that material met project technical specifications. Amec Foster Wheeler